You've not stated where you're starting from but you can now access Eurostar services from across wide areas of the country. (You can, for example, book through tickets from the north of England for only a little more than from London). Travelling with Eurostar would mean avoiding all of the hassle associated with airport check ins.
Eurostar tickets to Brussels include free onward travel to (or from) any other station in Belgium. Getting to
Bruges is really easy. Simply take Eurostar to Brussels, stroll round to platform 15 and hop on a train to Bruges. (There are at least 2 trains per hour, with a journey time of around an hour).
Bruges is a beautiful city, which is compact enough to be easily explored by those of more advanced years. Further, it's also a superb base for stress-free touring of the area. (Ghent is a short way back along the rail line to Brussels. The coastal resort of Ostend is only about 15 minutes away from Bruges. There are several other seaside resorts which are under half an hour away).
Eurostar return fares, from London to Bruges, start from �59 but it's worth considering upgrading to Leisure Select (=First Class), especially if you'll be travelling in the evening when dinner is served. (Meals are included in the fare. Dinner is always very tasty and comes with plenty of free wine and champagne).
http://www.eurostar.com
http://www.brugge.be/internet/en/index.htm
http://www4.gent.be/gent/english/tourism/index .htm
http://www.toerisme-oostende.be/index.phtml?la nguageid=3